Liquid-impelling device.



UNITED STATES P TEN OFFICE."

EDGAR P..HOLLY, or RoXBURY, MASSACHUSETTS, AssIGNoR TO THE noLLYsTEAM NGI- NEERING'COMPANY, OF PROVIDENCE, RnoDEisLAND, A CORPORATION OF RHODE ISLAND,

T 's invention relates to pumps or impelling devices and has for its ob ect to construct a ump with a plurality of sets'of propelling b ades, said sets increasing in diameter step by step from the fifst to the last so that t e effective working capacity of each succeeding set will "be gradually increased and at the same time the slip or percentage of loss of the propellers will be decreased 'and practically overcome.

A further object of the invention is to provide guiding or deflecting blades and place-a set in front of each set of propellers, as it'is found in the practical use of devices of this character'that where the water is driven or forced by one or more sets of rotary pro ellers that the action of the same on the uid has a tendency to start the fluid whirling orsurging through the pipe, thus greatly increasing the frictional resistance of the flowing liquid and also reducing the eiiiciency of the ropellers. By the introduction of the fixe blades to prevent the whirling motion of the'liquid and a plurality of propellers of gradually increasing size it is found that liquid may be forced through the pipes at a much greater rate of speed and also be forced to a much greater height, thereby greatly increasing the range of usefulness of the sys tem, broadening its field of action and ob-, tainingwthe maximum efliciency with the' expenditure of but the minimum amount of power.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described a plurality of sets of propelling blades. -IIiounted on a rotary shaft.

"Specification of Letters Patent.

* Application filed. February 26, 1908. Serial No. 417,829.

already shown.

'inner surface of t e cy LrQUID-IMPELLI'NG DEVICE.

PatentedOct. 13, 1 908.

' Referring to the drawings at 1 is the base plate on which both the driving motor and the impelling mechanism are mounted. This mechanism is com osed essentially of a cylinder 3 provided with inwardly projecting bearings 4 and 5 ateither end, sup orted on their res ective standards 6 and 7. By means 0 these two bearings the opposite ends of the cylinder and the mechanism con- .tained therein are held in line rendering the device adapted to be rotated or turned on its axis in said standards and set into an desired position, and to be securely he d by means of screws 88. The propeller shaft 9 is mounted in these bearings 4 and 5 and has located u on it three or more sets of propelling whee s 10, 11 and 12, preferably of the two-blade type. These sets of propelling blades are adapted to increase in diameter step by step fromthe first to the last in arithmetical progression, thefirst set .10 being the smaller, the second set 11 being ,slightly larger than the first set and the th rd set 12 being slightl' increased'over the second set, and so on. have herein shown three sets-of blades which is suflicient for 'accom lishing certain results,,b1 lt' two sets may e emloyed if desired and where it 1s necessary to ibr'ce the water ,to a greater height or to send the same with agreater force I may employ four or more sets of propelling blades w '0 will continue toincrease in size like those Another feature of my invention is that I have also provided means for guiding or directing the fluid straight through the pipes preventing the same from whirling or surging the ra idly revolving propelling blades 10., Y

11 an "12. These stationary fins or'directing vanes may be made in any convenient formand held in any convenient manner, but I have shown said blades, as illustrated in Fig. 2, as'being provided with a T-shaped head 14 at one ed e ada ted to fi-t against the finder to which these vanes are secured by means of .the bolts 15 and 16. An'y desired number of blades may be located between the pro ellers and a setof directing blades may a so be placed at either or both sides of said propellers, if de- "ahead of each set of propelling blades.

sired, but for ordinary work it is found necessary only to place one set of fixed blarips y the use of these fixed vanes or lates the propellers have a-much greater e ective action 'u on the fluid to force the same straight a ead without allowing it to take a whirhng or surging motion, thus greatly reducing the percentage of the flowing friction resistance in the pipe and giving the device a maximum force or 'fting power.

Connected to the outwardly turned ends of the right angle fitting 24 and 27 are the two correspondin downwardly turned ends 25 and 26 of the tting 28. The upper portion of this fitting is provided with a cont1nu ous passage or bypass 30 through which the liquid not forced t rough the system may re turn by a short course back to the propeller to be pumped over again. Located at the intersectingepoint, of the three branches of these fittin s and in the discharge channel is the rotatab le valve 29.- The opening in the pipe into which this valve is set is enlarged so that the passage way through the pipe will not be choked when the valve is open.

ception of the wall portion 31 which is left of sufficient width to either open wide or completely shut off the return passage way or bypass 30 when the handle 32, which is connected to the su porting shaft 33, is moved around into the otted position illustrated in Fig. 1. By means of this valve controlled bypass the quantity of liquid forced through the system may be nicely controlled without being obliged to regulate the speed of the This valve is cut away on its interior with the exof slip or loss in this style of unip over a pump with a positive action, (ike a )iston pump), and in order to com ensate or or overcome this percentage of s ip I have employed a plurality of propellers and increased the eflectwe working ca acity of each by increasing its diameter su ciently to overcome this slip or loss and cause this style of pump to deliver practically the same as a pump with the said positive action, at the same time eliminating the reat factor of friction over such a pum an obtaining practically the maximum e ciency with the ex lenditure of the minimum amount of riving power.

My improved impelling device is very sim ple in construction, and exceedingly efficient 1n its operation.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A liquid impelling device comprising an im elling chamber rovided with an inlet and an outlet, the wa l of said chamber being provided with annular recesses, a shaft rotatably mounted in said chamber, a plurality of pro ellers carried by said shaft and successive y increasing in diameter as they approach the outlet, said propeller being located at points between said recesses, and removable blades located in said recesses and interposedbetween said proplellers for preventm a whirling motion of t e fluid passing throu Ii said chamber.

2. liquid impelling device comprising an im elling chamber rovided with an inlet and anoutlet, the wa of said chamber being provided with annular recesses, a shaft rotatably mounted in said chamber, a lurality of propellers carried by said shaft, and located at points between said recesses, a plurality of blades provided with T-shaped heads fitting against the inner walls of said recesses, and means for securin said blades in position.

In testimony w ereof I aflix my signature in presence of two witnesses. I

EDGAR I. HOLLY.

Witnesses:

HOWARD E. BARLOW, E. I. OGDEN. 

